Shuford W H, Sybers R G, Gordon I J, Baron M G, Carson G C
AJR Am J Roentgenol. 1986 Mar;146(3):491-6. doi: 10.2214/ajr.146.3.491.
The authors present three cases of circumflex right aortic arch, a retroesophageal arch in which the aorta crosses from right to left behind the esophagus to descend on the left side. The findings on the frontal chest films resembled those of a left arch with mediastinal widening, simulating a mass. Aortography revealed four-vessel branching of the arch vessels, typical of right aortic arch with aberrant left subclavian artery. Computed tomography and barium studies of the esophagus demonstrated the retroesophageal course of the aorta. In two patients, obstruction of the thoracic portion of the left subclavian artery resulted in differences in blood pressure and pulse between the arms, supporting the clinical impression of dissecting aortic aneurysm.
作者报告了3例右旋主动脉弓病例，这是一种食管后弓，主动脉从右侧穿过食管后方至左侧下行。正位胸片上的表现类似于伴有纵隔增宽的左弓，类似肿块。主动脉造影显示弓血管呈四支分支，这是伴有迷走左锁骨下动脉的右主动脉弓的典型表现。计算机断层扫描和食管钡餐检查显示主动脉走行于食管后方。在2例患者中，左锁骨下动脉胸部段梗阻导致双臂血压和脉搏不同，支持主动脉夹层动脉瘤的临床诊断。
